Physa newcombi, Adams & Angas.
"Explorations in Australia, The Journals of John McDouall Stuart" by John McDouall Stuart
Cap, capitulum; sc, scapus; ph, physa.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2" by Various
Among the univalves, lymnea, physae, planorbis, and paludina, are the most useful and ornamental.
"The Book of the Aquarium and Water Cabinet" by Shirley Hibberd
The sub-family Physa has two genera, Aplecta and Physa.
"Our British Snails" by John William Horsley